问题

I am really sorry that I can’t visit you because I have to help my sister _______.[ ]
A: learning math
B: learns math
C: for learning math
D:with learning math
B: learns math
C: for learning math
D:with learning math
正确答案是:
同类题型
Now, some robots are __ to do the same things _ _ people.
How well Alan dances! I can’t believe my eyes!—______.[ ]
Kitty, have you seen the film Tai Embarrassed (《泰囧》) yet? — Yes. I ________ it last month.
I hope there _______ less pressure on us today.— If so, we _______ enjoy a more pleasant life.
The family________ at the lunch table when someone came to tell them what had happened at ________.